Mitt Romney, the presumptive Republican candidate for the US presidency (the National Convention is still a month or so away), has refused to release many of his tax returns to the public, a move that many find to be unusual. His campaign claims that it is unnecessary for them to be released, while many of his opponents have questioned if Romney has something he's trying to hide. Senate Majority Leader Harry Reid is one of those opponents. Recently he's made a claim that, if true, could seriously undermine Mitt Romney's chances in the election. The Huffington Post Reid claimed to have a source from Bain Capitol, the company Romney ran some years back. However, he would not name who exactly his source was, which makes their legitimacy somewhat questionable. Still, it's a powerful charge against the Republican candidate, one that he'll have trouble shaking off until he makes those tax returns open to the public. Does he some skeletons in the closet, or is he just a privacy minded individual? It looks like we'll have to wait and see.